My Sago Palm gave a flush last year, a month earlier this year. All the old leaves are dying, but the bulb is still hard. I moved to a new apartment so I'm thinking I disturbed it somehow.
Yes, your Sago Palm may be stressed from the move to a different location.
Lighting may have changed.
Make sure you are not overwatering the palm.
Regular fertilizer is important for the health of the Sago.
Here are a couple of links that should help you with your plant.